Coastal
Noun and の adjective
りんかい
日本の学生の多くは、夏に臨海学校に行く事を経験します。
Many Japanese students experience going to seaside schools during the summer.
If you look to the sea, you are seaside or coastal.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.